CN115396820A

CN115396820A - Wireless communication method, device and system

Info

Publication number: CN115396820A
Application number: CN202110502619.2A
Authority: CN
Inventors: 项弘禹; 李秉肇; 陈磊; 王燕; 许斌
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-05-09
Filing date: 2021-05-09
Publication date: 2022-11-25
Also published as: WO2022237552A1

Abstract

The present application relates to a communication method and a communication apparatus. Receiving system information from network equipment, determining a paging occasion calculation identifier as an identifier of a terminal according to the system information, or determining a first paging occasion according to the paging occasion calculation identifier for indicating a multicast service, and receiving a paging message of the multicast service at the first paging occasion. In a possible embodiment of the present application, a paging occasion calculation identifier for receiving a multicast paging message is indicated to a terminal through system information, the multicast paging message is received at a paging occasion corresponding to the identifier of the terminal, the terminal does not need to determine a new paging occasion, which is beneficial to reducing signaling overhead, and the utilization efficiency of paging resources is improved by receiving the multicast paging message at a paging occasion corresponding to the identifier indicating the multicast service.

Description

Wireless communication method, device and system

Technical Field

The present application relates to the field of communications technologies, and in particular, to a wireless communication method, apparatus, and system.

Background

Multimedia Broadcast Multicast Service (MBMS) or Multicast Broadcast Service (MBS) is a Service for multiple User Equipments (UEs), such as live Broadcast, timed program Broadcast, etc. The base station transmits the MBS to a plurality of UEs simultaneously. When a large number of UEs need to receive a certain multicast service, the base station establishes a dedicated bearer for the multicast service, and all UEs interested in the service can receive the MBS through the bearer.

When there is traffic data arriving, the network device needs to page the UE interested in the traffic data. And the paging occasions corresponding to different UE are different. In the MBS scenario, when MBS data arrives, the network device needs to send a paging message on a paging occasion corresponding to each UE to page each UE that needs to receive the MBS, so that signaling overhead in the paging process is large.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, so as to reduce signaling overhead of a communication system.

In a first aspect, a communication method, a corresponding communication device and a communication system are provided. The communication method is used in a communication system comprising a first terminal and a network device. Receiving system information from a network device; determining a paging occasion calculation identifier according to the system information, wherein the paging occasion calculation identifier is an identifier of a terminal, or the paging occasion calculation identifier is an identifier indicating a multicast service; determining a first paging occasion according to the paging occasion calculation identification; and receiving a paging message of the multicast service on the first paging occasion. In the scheme, a first terminal determines a paging occasion calculation identifier as an identifier of the first terminal or an identifier indicating a multicast service through system information, further determines a paging occasion according to the paging occasion calculation identifier, and receives a paging message of the multicast service at the paging occasion. The system information indicates the paging occasion calculation identification for receiving the multicast paging message, the multicast paging message is received at the paging occasion corresponding to the identification of the first terminal, which is favorable for reducing signaling overhead, and the multicast paging message is received at the paging occasion corresponding to the identification indicating the multicast service, which is favorable for improving the utilization efficiency of paging resources.

In an optional embodiment, an identifier of the terminal or an identifier indicating a multicast service is selected as the paging occasion calculation identifier according to the system information. Through the received system information, the first terminal judges which identifier is used for determining the paging occasion, and receives the paging message of the multicast service at the determined paging occasion, so that the first terminal can adapt to different paging modes and different access network devices, and the reliability of the paging process of the multicast service is improved.

In an optional embodiment, the determining the paging occasion calculation identifier according to the system information includes: if the system information includes system information related to multicast service, the paging occasion calculation identifier is the identifier of the terminal, or if the system information includes first indication information, the paging occasion calculation identifier is the identifier of the terminal. When the System Information includes System Information related to a multicast service, for example, system Information Block (SIB) related to MBS, or when the System Information includes first indication Information, the first terminal determines, after receiving the System Information, that the paging occasion calculation identifier is an identifier of the terminal, or selects, as the paging occasion calculation identifier, an identifier of the terminal from among the identifier of the terminal and the identifier indicating the multicast service, where the identifier of the terminal is, for example, a UE _ ID or a Temporary identifier (5 GS-Temporary mobile subscriber identity, 5G-S-TMSI) of a terminal device corresponding to the UE, or a Temporary UE identifier (5G global Unique UE identity, 5G-guy) Globally Unique to the corresponding 5G of the UE.

In an optional embodiment, the determining the paging occasion calculation identifier according to the system information includes: if the system information does not include system information related to the multicast service, the paging occasion calculation identifier is the identifier indicating the multicast service, or if the system information does not include the first indication information, the paging occasion calculation identifier is the identifier indicating the multicast service. Optionally, the system information is a set of SIBs, and the first terminal determines, according to the SIB related to MBS that is not included in the system information, that the paging occasion calculation identifier is an identifier indicating the multicast service, for example, the system information does not include SIB13 or does not include SIB15. Or, when the system information does not include the first indication information, determining an identifier indicating the multicast service as a paging occasion calculation identifier.

In an optional implementation manner, the first terminal may determine, according to the system information, a type of an access network device that sends the system information, when the received system information includes first indication information or includes an MBS-related SIB, the access network device is an access network device that indicates multicast paging or supports group paging, and may be referred to as an MBS supporting node, for example, the access network device has a multicast paging function, and may send a paging message of a multicast service to the terminal device at a paging occasion corresponding to unicast paging. When the received system information does not include the first indication information or the MBS-related SIB, the access network device that sends the system information is an access network device that does not support multicast paging or group paging, and may be referred to as a non-MBS supporting node or a legacy node, for example. Optionally, the access network device of this type does not know whether the paging message sent to the first terminal this time is a multicast paging message or a unicast paging message, and therefore sends the paging message of the multicast service to the first terminal at the paging occasion corresponding to the identifier indicating the multicast service.

In an alternative embodiment, when determining the paging occasion calculation identifier according to the system information, it is also possible to select between the service identifier of the multicast service and the identifier indicating the multicast service, in addition to selecting between the identifier of the terminal and the identifier indicating the multicast service. The service Identifier of the multicast service is, for example, a multicast broadcast service session Identifier (Identifier of the MBS session, MBS session ID), or an Identifier of the MBS service (MBS service ID). More options are provided for paging occasion determination corresponding to multicast paging messages.

In an optional embodiment, the first indication information is used to indicate that a new paging occasion does not need to be determined for a paging message for receiving a multicast service. Optionally, the new paging occasion refers to a paging occasion different from the paging occasion at which the terminal receives the unicast service paging message. Alternatively, the new paging occasion is determined by using a new identifier other than the identifier of the terminal as the paging occasion calculation identifier. The first indication information indicates that the first terminal receives the paging message of the multicast paging service at the unicast paging occasion where the unicast paging message is located. By carrying the first indication information, the first terminal receives the paging message of the unicast service and the paging message of the multicast service at the same paging occasion, thereby reducing the paging power consumption overhead of the terminal equipment for receiving the multicast service.

Optionally, the first indication information is a reserved bit in the SIB, for example, 1bit, and when 1 is taken, the UE1 is indicated to determine the identifier of the UE1 as the paging occasion calculation identifier, and when 0 is taken, the UE1 is indicated to determine the identifier indicating the multicast service, that is, the first identifier, as the paging occasion calculation identifier, which may be the other way around. Or may be indicated by taking true/false. Or, the indication of the identifier may be performed by whether the first indication information is in the system information, where if the first indication information exists in the system information, the UE1 is instructed to determine the identifier indicating the multicast service, that is, the first identifier, as the paging occasion calculation identifier, and if the first indication information does not exist, the UE1 is instructed to determine the identifier of the UE1 as the paging occasion calculation identifier. Optionally, the system information is an existing SIB, or the system information is a newly constructed SIB.

In an alternative embodiment, the identifier indicating the multicast service is preconfigured; or the mark indicating the multicast service is notified by network signaling; or the identifier indicating the multicast service is obtained according to the service identifier of the multicast service. Optionally, in a preconfigured manner, the identifier indicating the multicast service may be preconfigured in advance for the core network device to the first terminal. The multicast service identifier corresponds to multicast service data to be received by the first terminal. Optionally, in the network signaling notification manner, the network signaling may be one of broadcast signaling, non-Access Stratum (NAS) signaling, or Radio Resource Control (RRC) signaling. Optionally, the service identifier obtained according to the multicast service may be determined according to the service identifier of the multicast service and a mapping relationship, where the mapping relationship refers to a corresponding relationship between the service identifier of the MBS and the identifier indicating the multicast service. The mapping relationship may be predefined by a protocol, or may be determined by a User Service Description (USD), or in a service notification (service notification) phase in a multicast data distribution process (phases of multicast data distribution), the UE learns the mapping relationship between the MBS and an identifier indicating a multicast service, or acquires the mapping relationship in a service join (session join) phase in the multicast data distribution process.

In an optional embodiment, the paging occasion calculation identifier is an identifier of the terminal, and the paging message of the multicast service includes a service identifier of the multicast service; or the paging occasion calculation identifier is the identifier indicating the multicast service, and the paging message of the multicast service includes the identifier indicating the multicast service. .

When the paging occasion calculation identifier is the identifier of the UE1, the paging message of the multicast service includes a service identifier of the multicast service, for example, MBS session ID, for notifying the UE1 that the multicast service pages. When the paging occasion calculation identifier is an identifier indicating the multicast service, the paging message of the multicast service includes an identifier indicating the multicast service, for example, a special value of 5G-S-TMSI.

In an alternative embodiment of the method according to the invention,

the multicast service is associated with a terminal set, the terminal set includes one or more terminals, the identifier of the terminal is an identifier of a terminal in the terminal set, the paging occasion calculation identifier is an identifier indicating the multicast service, a paging cycle corresponding to the first paging occasion is a first paging cycle, and the first paging cycle is a minimum value of a Discontinuous Reception (DRX) cycle of the one or more terminals in the terminal set. .

The association between the terminal set and the multicast service means that the terminal device in the terminal set is interested in the multicast service or needs to receive the multicast service. The first paging cycle is used for the access network equipment to periodically send paging messages of the multicast service. The DRX period of the terminal equipment in the terminal set is the period for receiving the unicast service paging message, and the minimum value in the DRX period of the terminal equipment in the set is selected to ensure that the terminal equipment in the set can receive the multicast service paging message in the period.

In an alternative embodiment, the identity indicating the multicast service is different from the identities of one or more terminals in the set of terminals. The indication multicast service identifier is used for calculating the multicast service paging occasion of the access network equipment and the terminal equipment, and the indication is different from the identifier of the UE in the set, so that the conflict generated in the paging occasion calculation can be avoided.

In an optional embodiment, the method further comprises: the first terminal initiates a random access process, or the first terminal receives the multicast service from the first network device in a non-connected state.

The first terminal determines the multicast service paging according to the identification indicating the multicast service or the service identification of the multicast service carried in the paging message, and after determining the multicast service paging, the first terminal can further initiate a random access process to access the network and then receive the multicast service; or the first terminal may directly perform the reception of the multicast service in the unconnected state.

In a second aspect, a communication method, a corresponding communication device and a communication system are provided. Sending system information, wherein the system information comprises first indication information, or the system information comprises system information related to multicast service; determining a first paging occasion according to the identifier of the first terminal; and sending a paging message of the multicast service to the first terminal at the first paging occasion. Optionally, receiving the multicast paging message at the paging occasion corresponding to the identifier indicating the multicast service is beneficial to improving the utilization efficiency of the paging resource, and can save the overhead of the network device for calculating the paging occasion of the multicast service.

In an alternative embodiment, the first indication information is used to indicate that a new paging occasion does not need to be determined for receiving a paging message of a multicast service.

In an optional embodiment, the method further comprises: receiving first information from core network equipment, wherein the first information comprises a service identifier of the multicast service and an identifier list of a terminal set, the terminal set is associated with the multicast service, and the terminal belongs to the terminal set.

Optionally, the first information is a Next Generation Application Protocol (NGAP), or the first information is a part of an NGAP message. The NGAP message is a message sent by an access and mobility management function (AMF) in the core network device to the network device.

The core network device sends the service identifier of the multicast service and the UE set list to the access network device, so as to notify the access network device of the set of terminal devices corresponding to the multicast service, thereby facilitating the access network device to page the multicast service for the UEs. The first identification list may optionally be { UE1_ ID, UE2_ ID, …, UEN _ ID }, and may also include 5G-S-TMSI corresponding to each UE of the terminal set.

In an optional implementation manner, the first paging occasion is further configured to send a paging message of unicast traffic to the first terminal.

In an optional embodiment, the paging message of the multicast service includes a service identifier of the multicast service.

In an optional implementation manner, a paging cycle corresponding to the first paging occasion is a discontinuous reception DRX cycle of the first terminal.

In an optional embodiment, the method further comprises: the terminal set also comprises a second terminal, and a second paging occasion is determined according to the identification of the second terminal; sending a paging message of the multicast service to the second terminal at the second paging occasion, wherein a paging cycle corresponding to the second paging occasion is a DRX cycle of the second terminal

With regard to the second aspect or various alternative embodiments and technical effects of the second aspect, reference may be made to the above description with regard to the first aspect.

In a third aspect, a communication method, a corresponding communication device and a communication system are provided. Determining whether the network device supports multicast paging; when network equipment supports multicast paging, first information is sent to the network equipment, wherein the first information comprises a service identifier of multicast service and an identifier list of a terminal set, and the terminal set is associated with the multicast service; and when the network equipment does not support multicast paging, sending second information to the network equipment, wherein the second information comprises an identifier indicating multicast service.

In an optional embodiment, the method further comprises: and sending a first signaling to the first terminal, wherein the first signaling comprises the identifier indicating the multicast service. Optionally, the first signaling is one of broadcast signaling, NAS signaling, or RRC signaling.

In an optional embodiment, the identifier indicating the multicast service is different from the identifiers of the terminal devices in the terminal set.

In an optional implementation manner, the second information further includes a first paging cycle, where the first paging cycle is a minimum value of DRX cycles of terminal devices in the terminal set.

With regard to the third aspect or various alternative embodiments and technical effects of the third aspect, reference may be made to the above description with regard to the first, and/or second aspect.

In a fourth aspect, a communication device is provided. The communication device may be the terminal device according to any one of the first to third aspects, or an electronic device configured in the terminal device, or a larger device including the terminal device. The terminal device comprises corresponding means or modules for performing the above method. For example, the communication device: including a processing unit (also sometimes referred to as a processing module) and a transceiver unit (also sometimes referred to as a transceiver module). The processing unit is configured to receive, by the transceiver unit, first indication information from a second network device, and send, by the transceiver module, response information of the first indication information to the second network device.

For another example, the communication device includes: a processor, coupled to the memory, for executing the instructions in the memory to implement the method performed by the terminal device in any of the first to third aspects. Optionally, the communication device further comprises other components, such as an antenna, an input-output module, an interface, etc. These components may be hardware, software, or a combination of software and hardware.

In a fifth aspect, a communications apparatus is provided. The communication device may be the access network apparatus according to any one of the first to third aspects. The communication device has the function of the access network equipment. The access network device: for example, a base station, or a baseband device in a base station. In an alternative implementation, the communication device includes a baseband device and a radio frequency device. In another alternative implementation, the communication device includes a processing unit (sometimes also referred to as a processing module) and a transceiver unit (sometimes also referred to as a transceiver module).

And the processing unit is used for sending system information to the first terminal through the transceiver unit and sending a paging message of the multicast service to the first terminal through the transceiver module.

In an alternative implementation, the communication device includes a processing unit, which is coupled to the storage unit and executes the program or the instructions in the storage unit, so that the communication device can perform the functions of the access network equipment.

In a sixth aspect, a communications apparatus is provided. The communication device may be the core network apparatus according to any one of the second to third aspects. The communication device has the functions of the core network equipment. In an alternative implementation, the communication device includes a baseband device and a radio frequency device. In another alternative implementation, the communication device includes a processing unit (sometimes also referred to as a processing module) and a transceiver unit (sometimes also referred to as a transceiver module).

The processing unit is configured to send the first information or the second information to the access network device through the transceiver unit, and may also send an identifier indicating a multicast service to the first terminal through the transceiver module.

In an alternative implementation manner, the communication apparatus includes a processing unit, which is coupled to the storage unit and executes a program or an instruction in the storage unit, so that the communication apparatus is enabled to execute the functions of the core network device.

In a seventh aspect, a computer-readable storage medium is provided, which is used for storing a computer program or instructions, and when the computer program or instructions is executed, the method performed by the terminal device, or the first network device, or the second network device in the above aspects is implemented.

In an eighth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the method of the above aspects to be carried out.

Drawings

Fig. 1A is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 1B is a schematic diagram of an application scenario according to an embodiment of the present application;

fig. 1C is a schematic diagram of another application scenario according to an embodiment of the present application;

FIG. 2 is a simplified schematic diagram of another communication system in accordance with an embodiment of the present application;

fig. 3 is a flowchart of a communication method according to an embodiment of the present application;

fig. 4 is a schematic diagram of a service identifier cell structure of a multicast service according to an embodiment of the present application;

fig. 5 is a diagram illustrating a paging occasion calculation identifier as an identifier of a first terminal in an embodiment of the present application;

fig. 6 is a schematic diagram of a paging occasion calculation identifier in the embodiment of the present application being an identifier indicating a multicast service;

fig. 7 is another flowchart of a communication method according to an embodiment of the present application;

fig. 8 is a flowchart of a communication method according to an embodiment of the present application;

fig. 9 is a schematic block diagram of a terminal device provided in an embodiment of the present application;

fig. 10 is a schematic block diagram of a communication device provided in an embodiment of the present application;

fig. 11 is a schematic block diagram of a network device according to an embodiment of the present application.

Detailed Description

The scheme disclosed in the present application is applicable to the communication system 1000 shown in fig. 1A. As shown in fig. 1A, the communication system includes a radio access network 100 and a core network 200, and optionally, the communication system 1000 may further include an internet 300. The radio access network 100 may include at least one network device (e.g., 110a and 110b in fig. 1, which are collectively referred to as 110), and may further include at least one terminal (e.g., 120a to 120j in fig. 1, which are collectively referred to as 120). The terminals 120a to 120j are connected to the

network devices

110a and 110b in a wireless manner, and the

network devices

110a and 110b are connected to the core network 200 in a wireless or wired manner. The network device in the core network and the network device in the radio access network may be different physical devices, or the function of the core network and the logical function of the radio access network may be integrated on the same physical device, or a physical device may be integrated with part of the function of the core network and part of the function of the radio access network. The terminals and the network devices can be connected with each other in a wired or wireless manner. Fig. 1 is a schematic diagram, and other network devices, such as a wireless relay device and a wireless backhaul device, may also be included in the communication system, which are not shown in fig. 1. The communication system may support, for example, a cellular system related to third generation partnership project (3 GPP) (e.g., a 5G communication system), or a communication system supporting convergence of multiple wireless technologies (e.g., a 2G, 3G, 4G, or 5G converged communication system), or a future-oriented evolution system (e.g., a 6G access technology)), or a wireless fidelity (WiFi) system, or a communication system in which a cellular system related to 3GPP is converged with other technologies, and the like.

The network device in the present application may also be a network node. The network device includes an access network device, and/or a core network device. The access network equipment has a wireless transceiving function and is used for communicating with the terminal. The access network device includes, but is not limited to, a base station (base station) in the above communication system, an evolved NodeB (eNodeB), a Transmission Reception Point (TRP), a next generation base station (next generation NodeB, gNB) in the 5G mobile communication system, a next generation base station in the sixth generation (6 th generation, 6G) mobile communication system, a base station in the future mobile communication system, or an access node in the WiFi system, and the like; the present invention may also be a module or a unit that performs part of the functions of the base station, and for example, may be a Centralized Unit (CU), a Distributed Unit (DU), or the like. The access network device may be a macro base station (e.g., 110a in fig. 1), a micro base station or an indoor station (e.g., 110b in fig. 1), a relay node or a donor node, or a radio controller in a Cloud Radio Access Network (CRAN) scenario. The access network device may also be a server, a wearable device, or a vehicle-mounted device, etc. For example, the access network device in V2X technology may be a Road Side Unit (RSU). The access network device will be described below with reference to a base station as an example. The multiple network devices in the communication system may be base stations of the same type or different types. The base station may communicate with the terminal, or may communicate with the terminal through the relay station. A terminal may communicate with multiple base stations in different access technologies. The core network equipment is used for realizing the functions of mobile management, data processing, session management, policy, charging and the like. The names of devices implementing the core network function in systems with different access technologies may be different, and this application does not limit this. Taking a 5G system as an example, the core network device includes: an access and mobility management function (AMF), a Session Management Function (SMF), or a User Plane Function (UPF), etc.

A terminal may also be referred to as a terminal equipment, user Equipment (UE), a mobile station, a mobile terminal, etc. The terminal can be widely applied to various scenes, for example, device-to-device (D2D), vehicle-to-electrical (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wearing, smart transportation, smart city, and the like. The terminal can be cell-phone, panel computer, take the computer of wireless transceiving function, wearable equipment, vehicle, unmanned aerial vehicle, helicopter, aircraft, steamer, robot, arm, intelligent house equipment etc.. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal.

The base stations and/or terminals may be fixed or mobile. Base stations and/or terminals may be deployed on land, including indoors or outdoors, hand-held, or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons and satellite vehicles. The embodiment of the application does not limit the application scenarios of the base station and the terminal.

The roles of base station and terminal may be relative, e.g., helicopter or drone 120i in fig. 1 may be configured to move the base station, for those terminals 120j that access radio access network 100 through 120i, terminal 120i is the base station; however, for the base station 110a, 120i is a terminal, i.e. the base station 110a and 120i communicate with each other via a wireless air interface protocol. The device 110a and the device 120i may communicate with each other via an interface protocol between a base station and a base station, and in this case, the device 120i is a base station with respect to the device 110 a. Therefore, the base station and the terminal can be collectively referred to as a communication apparatus, and 110a and 110b in fig. 1 can be understood as communication apparatuses having a base station function, and 120a to 120j in fig. 1 can be understood as communication apparatuses having a terminal function.

In this application, the communication device having the function of the base station may be the base station, or a module (e.g., a chip or a chip system) in the base station, or a control subsystem including the function of the base station. For example, the control subsystem having the base station function may be a control center in an application scenario of the terminal, such as a smart grid, an industrial control, an intelligent transportation, or a smart city. The communication device with terminal function may be a terminal, or a module (such as a chip, a chip system, or a modem) in the terminal, or a device including terminal function. In this application, for convenience of description, a base station or BS, a terminal or a UE is taken as an example for illustration.

It is to be understood that, in order to implement the functions in the subsequent embodiments, the base station and the terminal include corresponding hardware modules, software modules, and/or firmware modules for performing the respective functions. In conjunction with the disclosure herein, one skilled in the art will appreciate that the present application can be implemented in hardware, or software, or firmware, or any combination thereof.

Fig. 1B and 1C show simplified network architecture diagrams of a communication system 1000 provided herein. As shown in fig. 1B, the network device in the radio access network may include a Centralized Unit (CU) and a Distributed Unit (DU). One CU may control one or more DUs. The CU and the DU may be divided according to the protocol layer functions of the wireless network provided therein, and for example, functions of a PDCP (packet data control) layer and protocol layers above the PDCP layer are provided in the CU, and functions of protocol layers below the PDCP layer, for example, a RLC (radio link control) layer and a MAC (media access control) layer, are provided in the DU. It should be noted that this division of the protocol layers is only an example, and may be divided in other protocol layers. The radio frequency device may be remote, not placed in the DU, or integrated in the DU, or partially remote and partially integrated in the DU, which is not limited in this application. With respect to the network architecture shown in fig. 1B, in the network architecture shown in fig. 1C, the Control Plane (CP) and the User Plane (UP) of the CU can be separately configured and implemented by different network entities, i.e., a control plane CU entity (CU-CP entity) and a user plane CU entity (CU-UP entity), respectively. In the network architecture, signaling generated by CUs may be sent to UEs through DUs, or signaling generated by UEs may be sent to CUs through DUs. The DU may pass through the UE or CU directly through protocol layer encapsulation without parsing the signaling. In the network architecture, the CUs may be divided into network devices on the RAN side and the CUs may be divided into network devices on the CN side, which is not limited in the present application.

With reference to figure 2 of the drawings, a simplified schematic diagram of a communication system is provided. The base station BS 110 comprises an interface 111 and a processor 112. Optionally, processor 112 is used to execute program 114. The processor 112 may store the program 114 or retrieve the program 114 from another device. Optionally, BS 110 includes a memory 113. The memory 113 is used to store a program 115. Program 115 may be pre-stored or subsequently loaded. Terminal UE 120 includes an interface 121 and a processor 122. Optionally, processor 122 is configured to execute program 124. The processor 122 may store the program 124 or retrieve the program 124 from another device. UE 120 may optionally also include memory 123. The memory 123 is used to store the program 125. Program 125 may be pre-stored or subsequently loaded. These components work together to provide the various functions described in this disclosure by UE 120 and/or BS 110. For example, processor 112 and interface 121 work together to provide a wireless connection between BS 110 and UE 220. Processor 122 and interface 121 cooperate to implement downlink transmission and/or uplink transmission for UE 120.

The network 130 may include one or

more network devices

130a, 130b (collectively 130) to provide core network functionality. The network device 130 may be a next generation (e.g., sixth generation (6G) or higher) core network node, or a legacy (e.g., 5G, 4G, 3G, or 2G) core network node. For example, the network 130 may be an Access Management Function (AMF), a Mobility Management Entity (MME), and the like. Network 130 may also include a Public Switched Telephone Network (PSTN), one or more network nodes in a packet data network, an optical network, an IP network, a Wide Area Network (WAN), a Local Area Network (LAN), a Wireless Local Area Network (WLAN), a wireline network, a wireless network, a metropolitan area network, and other networks to enable communication between UE 120 and/or BS 110.

The

processors

112, 122 may include one or more processors as a combination of computing devices. Processor 112 and/or processor 122 may include one or more of the following, respectively: a microprocessor, a microcontroller, a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), a Programmable Logic Device (PLD), gated logic, transistor logic, discrete hardware circuitry, processing circuitry, or other suitable hardware, firmware, and/or a combination of hardware and software configured to perform the various functions described in this disclosure. The

processors

112, 122 may be general purpose processors or special purpose processors. For example, the

processors

112, 122 may be baseband processors or central processors. The baseband processor may be used to process communication protocols and communication data. The central processor may be used to cause BS 110 and/or UE 120 to execute software programs and process data in the software programs.

Interfaces 111, 121 may include any suitable hardware or software for enabling communication with one or more computer devices (e.g., UEs, BSs and/or network devices). For example, in some embodiments, the interfaces 111, 121 may include terminals and/or pins for coupling wires for wired connections or for coupling radio transceivers for wireless connections. In some embodiments, the interfaces 111, 121 may include a transmitter, a receiver, a transceiver, and/or an antenna. The interface may be configured to enable communication between computer devices (e.g., UEs, BSs and/or network nodes) using any available protocol (e.g., 3GPP standard protocols).

A program in this application refers to software in a broad sense. The software may be program code, a program, a subroutine, an instruction set, code segments, software modules, an application, a software application, etc. The program may be executable in a processor and/or a computer to cause BS 110 and/or UE 120 to perform various functions and/or processes described herein.

The

memory

113, 123 may store necessary data required when the

processor

112, 122 executes software. The

memories

113, 123 may be implemented using any suitable storage technology. For example, the

memory

113, 123 may be any available storage medium that may be accessed by a processor and/or computer. Non-limiting examples of storage media are: RAM, ROM, EEPROM, CD-ROM, removable media, optical disk storage, magnetic disk storage media, magnetic storage devices, flash memory, registers, status memory, remote installation memory, local or remote memory components, or any other medium that can carry or store software, data, or information and that can be accessed by a processor/computer.

The

memory

113, 123 and the

processor

112, 122 may be provided separately or may be integrated.

Processors

112, 122 may read information from, store information in, and/or write information to

memories

113, 123. The memory 113 may be integrated in the processor 112. The memory 123 may be integrated in the processor 122. The

processors

112, 122 and

memories

113, 123 may be provided in an integrated circuit (e.g., ASIC). The integrated circuit may be provided in the UE or the BS or other network node.

For the purpose of understanding the embodiments of the present application, first, a brief description will be given of the related art referred to in the present application.

Ue status.

In the 4G system, the connection state is divided into an RRC connection state and an RRC idle state according to an RRC (Radio Resource Control), and when the UE is powered on and does not establish a connection with the wireless network, the UE becomes in the idle state. When the UE has data to receive or send, the UE needs to establish a connection with the wireless network, that is, the UE needs to enter a connected state to receive and send the data. The 5G network retains the concepts of an RRC idle state and an RRC connected state, and in addition, the 5G is additionally provided with a connected state, namely an RRC deactivated state, and the three states can be mutually converted. For the related description of RRC CONNECTED state (RRC _ CONNECTED), RRC IDLE state (RRC _ IDLE), and RRC INACTIVE state (RRC _ INACTIVE), reference may be made to the 3gpp TS 38.300 standard.

2. And (4) paging process.

When there is traffic data arriving, the network needs to page the UE. And the gNodeB sends the paging message to the UE through an air interface, the UE in the RRC _ IDLE state or the RRC _ INACTIVE state receives the paging message at the air interface time domain position corresponding to the UE, and the UE monitors and analyzes corresponding paging DCI and acquires whether the UE is paged according to the content indicated by the DCI. The corresponding air interface time domain position is represented by a Paging Frame PF (Paging Frame) and a Paging Occasion PO (Paging interference). PF is 1 radio frame, which represents the paging start frame, and contains multiple complete POs. PO is 1 set of PDCCH monitoring opportunities, consisting of multiple slots. The length of 1 PO is equal to one beam scanning period (corresponding to multiple beams), and the Paging message transmitted on each beam is the same.

PF and PO satisfy the following relationship:

system Frame Number (SFN):

(SFN+PF_offset)mod T＝(T div N)*(UE_ID mod N) (1)

i _ s of PO: i _ s = floor (UE _ ID/N) mod Ns (2)

I _ s of a PO indicates the starting location of a set of PDCCH monitoring opportunities, and the UE receives a paging message from the i _ s th PO.

Wherein: t is the DRX cycle (i.e. paging cycle) of the UE, PF _ offset is the frame offset of PF, N is the number of PFs included in the paging cycle T, UE _ ID is the identity of the UE, and Ns is the number of POs included in the PF.

Fig. 3 illustrates a communication method provided in an embodiment of the present application.

S301, the network equipment (such as a base station) sends system information to the terminal UE. Accordingly, the UE receives system information from the network device.

In the present embodiment, the terminal UE represents the opposite party communicating with the network device, and represents one or more UEs. When to distinguish between different UEs, the different UEs may be labeled UE1, UE2, UE3 …. The system information from the network device received by UE1, UE2, UE3 … respectively can be recorded as system information 1, system information 2, and system information 3 ….

The network device may carry the system information in a Radio Resource Control (RRC) message and send the system information to the UE, or the network device sends the system information to the UE in a broadcast manner.

And S302, the UE determines a paging occasion calculation identifier according to the system information. The paging occasion calculation identifier is an identifier of the UE, or the paging occasion calculation identifier is a first identifier. The first identification is used for indicating the identification of multicast service (MBS).

In one implementation, the determining, by the UE, the paging occasion calculation identifier according to the system information specifically includes: and the UE selects one identifier from the identifier of the UE and the first identifier according to the system information as a paging occasion calculation identifier. Optionally, the Identifier of the UE is preconfigured by the network device or sent to the UE through network signaling, for example, the Identifier is indicated to the UE through a 5G Temporary Mobile subscriber Identifier 5G S-temporal Mobile Subscription Identifier (5G-S-TMSI).

The paging occasion calculation identification is used for determining the paging occasion of the MBS. The receiving time of the paging message is related to the paging occasion calculation identification. For example, the paging frame PF and the paging occasion PO are related to the paging occasion calculation identity.

It should be noted that the paging occasion in this application is understood to be used to indicate the time domain location related to paging, i.e. the paging occasion includes the paging frame number PF and i _ s of the starting location PO of the listening opportunity.

The identity of the UE may be denoted as UE _ ID. For example, for UE1, its identity may be denoted as UE1 \/id, for UE2, its identity may be denoted as UE2 \/id, and so on, and the present application does not limit the representation. In one possible embodiment, the UE _ ID may be obtained from a temporary identity of the UE. For example, the Temporary identifier is 5G-S-temporal Mobile Subscriber Identity (5G-S-TMSI). The UE _ ID satisfies: UE _ ID =5G-S-TMSI mod 1024. The network equipment allocates different 5G-S-TMSI for different UEs as much as possible, i.e. the UE _ IDs are as different as possible, which ensures that the paging occasions based on different UE _ IDs are as different as possible for different UEs. For example, multiple UEs are discretely (e.g., uniformly) allocated to different paging occasions, so as to avoid excessive UE number on a single paging occasion, which may result in network paging pressure. Optionally, the identifier of the UE is a 5G-S-TMSI corresponding to the UE, or a 5G-GUTI which is a globally unique temporary UE identifier of 5G corresponding to the UE.

It should be noted that MBS in the present application can be understood in a broad sense, and refers to multicast service, or broadcast service, or any combination thereof. The first identifier is used for indicating (explicit or implicit) or identifying the MBS. The UE may receive the paging message of the MBS at a paging occasion determined based on the first identity. For example, the first identifier may be an identifier indicating a multicast service, and is used to indicate the multicast service. For another example, the first identifier may be an identifier indicating a multicast service, and is used to indicate the multicast service. For another example, the identifier indicating the MBS may be an identifier indicating a broadcast service, which is used to indicate the broadcast service. The MBS is a service for multiple terminals, such as an internet of vehicles service, a software downloading service, live broadcasting, timed program playing, and the like, and sends the MBS to multiple UEs through a base station.

The first identifier may be implemented in various ways. For example, existing identities may be used, or existing identities may be modified to enable indication of MBS, and new identities may be constructed or defined to indicate MBS.

In one implementation, the information field or part of the information field of the existing identifier is regarded as the first identifier, so that the existing information structure can be utilized without configuring new signaling. For example, the indication of MBS may be implemented using a Globally Unique Temporary user Identity, such as a 5G Global Unique temporal UE Identity (5G-GUTI), or a 5G S-temporal Mobile Subscription Identity (5G-S-TMSI), or other Identity. The 5G-S-TMSI is a shortened form of 5G-GUTI used for more efficient radio signaling procedures (e.g., in paging and service request procedures)

For the structural definitions of 5G-GUTI and 5G-S-TMSI, reference is made to the 3GPP TS 23.501 standard. The structure of the 5G-GUTI is as follows:

<5G-GUTI>＝<GUAMI><5G-TMSI>

wherein < GUAMI > = < MCC > < MNC > < AMF Identifier >

The structure of 5G-S-TMSI is as follows:

<5G-S-TMSI>＝<AMF Set ID><AMF Pointer><5G-TMSI>

where MCC denotes a mobile country code (mobile country code) and MNC denotes a mobile network code (mobile network code). The AMF Region ID is used to identify a Region, for example, 8bits. The AMF Set ID uniquely identifies the AMF Set within the AMF area. The AMF Pointer identifies one or more AMFs within the AMF set. The 5G-TMSI is used to uniquely identify the UE within the AMF. For example, if AMF Set ID is 10bit, AMF Pointer is 6bits, and 5G-TMSI is 32bits, then 5G-S-TMSI is 48bits.

In one implementation, when using the 5G-GUTI or using the 5G-S-TMSI as the first identifier, the value of the 5G-S-TMSI may be configured or predetermined as a given value, so that it is distinguished from other values used for identifying the UE. By design, the value of the 5G-S-TMSI used for indicating the MBS is different from the value of the 5G-S-TMSI allocated to the UE for determining the UE _ ID, so that the conflict caused by the same 5G-S-TMSI identification used for identifying the MBS and the UE is avoided. The 5G-S-TMSI for a given special value may be used to indicate MBS, referred to as special 5G-S-TMSI. For example, the range of values of the 5G-S-TMSI allocated to a plurality of terminals is interval 1, and the range of values of the 5G-S-TMSI used for indicating the MBS may avoid interval 1.

The design of the first identifier may be implemented in a number of ways. For example:

(1) When the bit corresponding to the AMF Set ID in the 5G-S-TMSI takes a special value, the 5G-S-TMSI is marked as the special 5G-S-TMSI, and the other bits except the AMF Set ID in the special 5G-S-TMSI are used for representing the MBSservice ID. For example, when the bit corresponding to AMF set ID takes all 1 value, the 5G-S-TMSI is special 5G-S-TMSI, and the value of bit occupied by AMF pointer and 5G-TMSI is used for representing MBS serviceID; or when the first 5 bits in the bits corresponding to the AMF set ID take all 1 values, the 5G-S-TMSI is the special 5G-S-TMSI, and the values of other 43 bits in the bits corresponding to the 5G-S-TMSI are used for indicating the MBSservice ID.

(2) When part of bits corresponding to the 5G-S-TMSI takes special values, the 5G-S-TMSI is marked as special 5G-S-TMSI. A mapping relationship between a special value and the MBS may be defined (for example, as shown in table 1 below), and an association relationship between the special 5G-S-TMSI and the MBS service ID may be established. For example, when AMD set ID takes all 1 values, the 5G-S-TMSI is the special 5G-S-TMSI, and the values of bit corresponding to the mapping relation 1, AMF pointer and 5G-TMSI are used to represent MBS service ID, as shown in the following table 1. When the AMD set ID takes the value of all 0, the 5G-S-TMSI is the special 5G-S-TMSI, and the bit occupied by the corresponding mapping relation 2, AMF pointer and 5G-TMSI is used for representing the MBS service ID. Optionally, the mapping relation 2 is different from the mapping relation 1, for example, in the mapping relation 2, MBS1 corresponds to the identifier 2, and MBSs 2 corresponds to the identifier 1. It should be noted that although different mapping tables may be represented by different specific values, such as the values of AMD set ID described above, other methods are not excluded to indicate the existence of different mapping tables, for example, network parameter configuration, where the frequency band is configured as FR1 and corresponds to mapping relation 1, and where the frequency band is configured as FR2 and corresponds to mapping relation 2, and similarly, FDD/TDD may also be used, or subcarrier spacing may be used to indicate the mapping relation.

(3) The first identity is managed by the core network CN, e.g. the CN reserves a special 5G-S-TMSI instance to represent the MBSservice instance, and the CN needs to avoid using this special 5G-S-TMSI instance when it is allocated to the UE' S normal 5G-S-TMSI.

The UE may acquire the first identity in a variety of ways. For example:

the first identifier is predetermined, e.g., pre-configured or agreed upon by a standard protocol. For example, the core network device allocates in advance an identity of an MBS to the UE, where the identity of the MBS corresponds to MBS data to be received by the UE. For example, before the session joins the session join, the network device is preconfigured with identifiers indicating multicast services corresponding to the multicast services, so that the identifier indicating the multicast service can be determined according to the preconfigured information after the UE completes the session join process. The multicast Data distribution process (phases of multicast Data provisioning) includes the processes of service notification, session joining UE Session Join, session Establishment, data Transfer, and the like.

And the first identifier is indicated to the UE by the network equipment through signaling. For example, through broadcast signaling, NAS signaling, RRC signaling, or the like, the signaling carries or implicitly indicates the first identifier, or indicates a mapping relationship between each MBS of the UE and the first identifier. For example, after the session join, the UE sends the identifier of the multicast service to the UE for the multicast service to be received by the UE, so that overhead can be saved.

Optionally, the UE confirms the MBS that needs to be added, for example, the UE confirms that the MBS needs to be added after receiving the service notification. The UE initiates a corresponding session join procedure. For example, in the Session process of the UE, the network device indicates, through signaling, the MBS first identifier corresponding to the MBS.

And the first identifier is obtained according to the service identifier (MBS service ID) of the MBS.

The UE determines the identification indicating the MBS according to the MBS service ID and the mapping relation, wherein the mapping relation refers to the corresponding relation between the service identification of the MBS and the identification indicating the MBS, namely the mapping relation between the service identification of the MBS and the first identification, and the first identification is used for calculating the receiving opportunity of the MBS paging message.

Table 1 below shows an example of a mapping relationship between the MBS service ID and the first identifier. In this example, the first identifier is represented by a 5G-S-TMSI, and the mapping relationship may be one-to-one, or one-to-many, for example, when there are many MBS types, one 5G-S-TMSI may correspond to two or more MBS service IDs, and the identifiers corresponding to the two or more MBS indicate that the MBS is the same, that is, the same paging occasion is shared, which is beneficial to improving efficiency of MBS paging.

TABLE 1

MBS service ID	First mark
		MBS1 (e.g., internet of vehicles service)	Identification 1 (e.g., 5G-S-TMSI _ 1)
MBS2 (e.g., software download service)	Identification 2 (e.g., 5G-S-TMSI _ 2)
		……	……

The corresponding relationship or mapping relationship may be obtained by the following methods:

A1. the correspondence or mapping may be pre-configured or predefined by a protocol. And the UE determines a first identifier corresponding to the corresponding relation according to the corresponding relation and the service identifier of the MBS.

A2. Through User Service Description (USD), the UE may obtain information such as the start time, the frequency band where the MBS is located, and configure a mapping relationship between the MBS and the first identifier in the USD, so that the UE may obtain the mapping relationship between the MBS and the first identifier through the USD.

A3. In the service notification stage, the UE knows the correspondence between the MBS and the first identifier. The multicast Data distribution process (phases of multicast Data provisioning) includes the processes of service notification, UE Session joining in UE Session Join, session Establishment, data Transfer, and the like.

A4. And in the stage that the service joins the session join, the UE acquires the corresponding relation between the MBS and the first identifier.

Optionally, the network indicates the mapping relationship between the MBS identifier and the first identifier to the UE through system information broadcast. The mapping relationship is carried in system information. The mapping relationship may be sent to the UE through a Broadcast Control Channel (BCCH), and optionally, the mapping relationship may also be sent to the UE through a multicast control logical channel (MCCH) and a multicast traffic logical channel (MTCH).

And B, the UE determines a corresponding first identifier according to the service identifier of the MBS and a preset rule. The UE knows that the core network device constructs the first identity based on a predefined method. In a possible implementation manner, the length of the first identifier is 48bits, and when a part of bits in the first identifier, for example, the first 24 bits, is a special value, other parts of bits in the first identifier (for example, the last 24 bits, or part of bits in the last 24 bits) represent the MBS. For example, MBS is represented by MBMS service ID part in Temporary Mobile Group Identity (TMGI). Fig. 4 shows the cell structure of the TMGI, which includes the MBMS Service ID field, e.g., which may occupy 24 bits, and the value of the field is used to indicate the MBS. Therefore, when the UE determines the service identifier of the MBS, the UE may also determine the first identifier corresponding to the MBS based on the predetermined rule. For example, the predefined method: the first identifier is a special value obtained by adding a certain bit number to the MBMS service ID, for example, a combination of 24-bit 1 and the MBMS service ID is the first identifier, and the first identifier minus the first 24-bit MBMS service ID is the MBMS service ID, so that the UE can add 24-bit 1 to the service identifier of the MBS to obtain the first identifier. Optionally, the UE may determine which multicast service is to be received in a preconfigured manner, or USD, or in a service notification phase, that is, whether to receive the car networking service data or the software download data, for example, the TMGI may inform the UE in a preconfigured manner.

Specifically, the UE determines a paging occasion calculation identifier according to the system information, or the UE selects the identifier of the UE or selects the first identifier as the paging occasion calculation identifier according to the system information.

In one possible implementation, the UE determines the paging occasion calculation identifier based on whether a System Information Block (SIB) related to the MBS is included in the system information. If the system information comprises SIB related to MBS, UE determines the calculation mark of paging time as the mark of UE; if the system information does not include the SIB related to the MBS, the UE determines that the paging occasion calculation identifier is the first identifier (i.e. the identifier for indicating the MBS).

When the system information sent by the network equipment to the UE includes the SIB related to the MBS, it is equivalent to indicating to the UE that a new paging occasion is not required to be calculated when receiving the paging of the MBS, or it may be considered that a paging message of the MBS is received using a unicast service paging occasion is indicated to the UE. Optionally, the new paging occasion refers to a paging occasion that is different from a paging occasion at which the first terminal receives the unicast service paging message. Or, the new paging occasion refers to a paging occasion determined by using a new identifier other than the identifier of the first terminal as the paging occasion calculation identifier, and in some cases, although the paging occasion calculation identifier is different from the identifier of the UE, the obtained paging occasion may be the same after modulo calculation in formula 1. The indication mode is implicit indication. And the UE judges whether to use the terminal identifier or the first identifier as the paging occasion calculation identifier by whether the SIB of the relevant type exists in the system information or not to calculate the PO. For example, the system information is a set of system information, which includes two or more system information SIBs, and when the system information includes MBS-related SIBs, for example, SIB types including SIB13, SIB15, or SIB20, the UE determines that the paging calculation identifier is the identifier of the UE.

In another possible implementation, the UE determines the paging occasion calculation identifier based on whether the indication information is included in the system information. If the system information includes the first indication information, the UE determines that the paging occasion calculation identifier is the identifier of the UE, and if the system information does not include the first indication information, the UE determines that the paging occasion calculation identifier is the first identifier (i.e., the identifier for indicating the MBS).

And if the system information comprises the first indication information, the UE selects the paging occasion calculation identifier as the identifier of the UE. The first indication information is used for indicating that a new paging occasion is not required to be determined for receiving the paging message of the MBS. For example, the reserved bit in the SIB may be used as the first indication information, e.g., 1bit, and when 1 is taken, the UE is instructed to determine to use the identifier of the UE as the paging occasion calculation identifier, and when 0 is taken, the UE is instructed to determine to use the first identifier as the paging occasion calculation identifier, or vice versa. Or may be indicated by taking true/false. Alternatively, the instruction may be performed by whether or not the first instruction information is included in the system information. And if the system information comprises the first indication information, indicating the UE to determine the first identifier as a paging occasion calculation identifier, and if the system information does not comprise the first indication information, indicating the UE to determine the identifier of the UE as the paging occasion calculation identifier, or vice versa. For example, if the cell includes the setup delay { first indication information }, it represents that the first indication information does not exist in the system information. The system information may be an existing type of SIB or the system information may be a newly defined SIB.

If the system information sent by the device to the UE does not include SIB related to MBS, it is equivalent to indicating to the UE that the MBS paging needs to be received by using a new paging occasion, or it can be considered that the MBS paging occasion is indicated to the UE to receive the MBS paging message.

Optionally, the first system information is further used to indicate a type of a network device that transmits the system information. The types include: group paging is supported, and/or group paging is not supported.

For network devices supporting group paging, it may be referred to as MBS supporting nodes. The network equipment of the type can send the group paging message to the UE on the unicast PO of each UE in a group paging mode, and for the UE, the unicast and multicast paging messages are received on the same PO, so that the resource utilization efficiency is improved, and the expenditure is saved. Optionally, the calculation overhead of the network device for calculating the paging occasion of the multicast service can be further saved.

For network devices that do not support group paging, they may be referred to as non-MBS Supporting nodes or Legacy nodes. The network device of the type does not have the function of multicast paging or group paging, and for the network device of the type, the identifier which indicates the multicast paging from the core network device is received, namely the first identifier, and the paging message of the MBS is sent on the PO corresponding to the first identifier. This type of network device does not necessarily need to recognize the first identity. For example, the first identifier may be designed to be consistent with the structure of the identifier of other UEs and the information domain where the identifier is located, and for a network device that does not support group paging, after receiving the first identifier, the network device may perform processing according to the existing legacy paging procedure without knowing that the first identifier is used for indicating the MBS. And, after determining the first identity, the corresponding UE may receive a paging message on the PO corresponding to the first identity. By adopting the mode, the requirement of multicast paging can be realized without changing the existing processing flow of the base station.

Optionally, if the system information includes an SIB related to MBS, the UE determines that the network device supports multicast paging, and the UE determines that the identifier of the UE is a paging occasion calculation identifier. If the system information does not include SIB related to MBS, UE determines that the network device does not support multicast paging, and determines the first identifier as a paging occasion calculation identifier.

Optionally, if the system information includes the first indication information, the UE determines that the network device supports multicast paging, and determines that the identifier of the UE is a paging occasion calculation identifier. If the system information does not include the first indication information, the UE determines that the access network equipment does not support multicast paging, and the UE determines that the first identifier is a paging occasion calculation identifier.

And S303, the UE determines a first paging occasion according to the paging occasion calculation identification.

The first UE calculates a first paging occasion using the paging occasion identity determined in 302.

A Paging occasion calculation identifier, denoted as Paging _ ID, in an implementation manner, the Paging occasion calculation identifier satisfies the following relationship: :

(SFN+PF_offset)mod T＝(T div N)*(Paging_ID mod N) (3)

i_s＝floor(Paging_ID/N)mod Ns (4)

where i _ s indicates the starting location of a set of PDCCH monitoring opportunities, the UE receives paging messages starting from the ith _ s PO. T is the DRX cycle (i.e., paging cycle) of the UE, PF _ offset is the frame offset of PF, N is the number of PFs included in the paging cycle T, and Ns is the number of POs included in the PF.

Optionally, the Paging _ ID in the above formula (3) and formula (4) is taken as Paging _ ID or taken as Paging _ ID mod 1024.

S304, the network equipment sends the paging message of the MBS to the UE on the first paging occasion. Correspondingly, the UE receives the paging message of the MBS at the first paging occasion

The paging occasion calculation mark is the mark of the UE, and the paging message of the MBS comprises the service mark of the MBS. UE1 determines to be paged by MBS according to MBS service ID or MBS session ID carried in MBS paging message.

The paging occasion calculation mark is the mark indicating MBS, and the paging message of MBS comprises the mark indicating MBS. The UE1 determines to be paged by the MBS according to the identifier indicating the MBS carried in the paging message of the MBS, namely the first identifier, such as 5G-S-TMSI with a special value.

Optionally, the paging message is sent periodically, that is, after the UE1 determines the first paging occasion, the paging message from the MBS of the access network device is received periodically.

And if the paging occasion calculation identifier is the identifier of the UE, the paging cycle corresponding to the first paging occasion is the discontinuous reception DRX cycle of the UE.

As shown in FIG. 5, when the paging occasion calculation identity is the identity of the UE, the first paging occasion is in phase with the paging occasion PO at which the UE receives the unicast paging messageMeanwhile, the UE monitors the PO, and can receive both unicast paging messages and multicast paging messages on the PO, thereby reducing the paging power consumption overhead of the UE for receiving the MBS. When the message received on PO carries MBS identification, UE determines to be paged by MBS instead of unicast service. Unicast and multicast share the same paging occasion, and the paging cycle may be the same, or the paging message cycle of MBS is N times the paging cycle of unicast service, i.e. MBS paging cycle is N × T ^DRX 。

The paging occasion calculation mark is the mark indicating MBS, and the paging cycle corresponding to the first paging occasion is the first paging cycle.

The determination of the first paging cycle is possible in the following way:

mode A: the paging cycle is determined by the core network device as an MBS paging cycle. When MBS data arrives at a User Plane Function (UPF), and a core network device CN (e.g. a network element AMF in the core network device) needs to page the MBS UE, the CN sends an NG paging message to the access network device, where the paging message content may include: UE paging identity (in this case the first identity), UE DRX cycle (to calculate the paging occasion for the UE, in this case the MBS paging cycle). The method for UE1 to acquire the paging cycle at this time may be NAS signaling, for example, the paging cycle is sent to UE1 along with the normal DRX cycle in the registration or TAU procedure. Or acquiring through RRC signaling, for example, the MBS paging cycle is part of the configuration information of the MBS, and the network informs the UE through RRC signaling or SIB or MCCH.

Mode B: the paging cycle is consistent with the paging cycle of the UE unicast service message, i.e. the paging cycle for MBS is not configured additionally.

Mode C: the first paging cycle is a minimum value of Discontinuous Reception (DRX) cycles of one or more UEs in the set of UEs. The set of UEs is associated with the MBS. The UEs shown in fig. 3 belong to the set of UEs. The set of UEs includes one or more UEs, e.g., UE1, UE2, UE3 …. The first paging cycle is the minimum value of the DRX cycles of the UEs in the UE set, so that the UEs in the UE set can all receive the multicast paging messages from the access network equipment.

In fig. 6, the first identity is determined as the paging occasion calculation identity. The UE obtains a first paging occasion according to the first identifier, and receives the paging message of the MBS at the first paging occasion, for example, the first paging occasion is used for the UE1 to receive the paging message of the MBS1, and the first paging occasion is also used for the UE2 to receive the paging message of the MBS1. It should be noted that 1,2,3 in MBS1, MBS2, MBS3 … is only used to indicate a certain MBS, so as to distinguish different multicast services.

The MBS1 is associated with a set of UEs, which can be understood as a set of UEs that want to receive MBS1 services. In other words, the UEs in the UE set are all interested in the MBS1 service. The UE1 and UE2 have different user identities, so the POs for UE1 and UE2 to receive unicast traffic may be different, because although the user identities are different, the paging occasions obtained after taking mod to the user identities in formula (1) may be the same. The UE1 and the UE2 belong to the first UE set, so the UE2 also determines the first paging occasion according to the same paging occasion calculation identifier, that is, the UE1 and the UE2 receive the paging message of the MBS1 at the same first paging occasion. UE1 and UE2 also need to monitor their respective unicast paging, the corresponding PO is determined according to the normal 5G-S-TMSI, and the DRX cycle negotiations are completed through a registration (registration) or Tracking Area Update (TAU) process, so as to acquire their respective DRX cycles.

The network equipment sends the paging message of the MBS on the PO, and one or more UE (user equipment) related to the MBS receives the paging message of the MBS on the PO, thereby saving the calculation expense for calculating the MBS paging occasion.

In fig. 6, the first paging occasion is different from the PO for UE1 to receive the unicast paging message, and optionally, in some scenarios, although the paging occasion calculation identifier for determining the first paging occasion is different from the identifier of UE1, the POs corresponding to the PO calculated by the PO calculation formula may be the same.

The first identity is different from identities of one or more UEs in the set of UEs, and therefore based on the first identity, and different from a PO determined based on the identities of the UEs, it is avoided that the network device performs unicast paging on one UE (e.g., UE 1) and multicast paging on another UE (e.g., UE 2) on the same PO, thereby causing a collision.

Optionally, the method may further include step S305.

S305.UE initiates a random access process to establish connection with network equipment, or UE receives the MBS from the access network equipment in a non-connection state. The MBS data may be read through a multicast control logical channel MCCH or a multicast service logical channel MTCH.

Optionally, the content of the UE identifier is related in the above method step flow, and the UE identifier may be replaced with an MBS session ID or an MBS service ID.

For example, UE1 determines the paging occasion calculation identifier in the MBS session ID and the identifier indicating the multicast service according to the first system information. The paging message of the multicast service may carry an MBS session ID for indicating the UE that the paging message is a multicast service paging message.

In this embodiment, the UE determines or selects the paging occasion calculation identifier according to the system information sent by the network device, so that the paging occasion for receiving the multicast paging message can be obtained based on the paging occasion calculation identifier. If the system information comprises the first indication information or comprises the related SIB of the MBS, the UE receives the paging information of the MBS based on the paging occasion corresponding to the identification of the UE, thereby leading the UE to receive the paging of the MBS when receiving the paging occasion of the unicast paging, and reducing the paging power consumption overhead of the MBS received by the UE. If the system information does not include the first indication information or does not include the related SIB of the MBS, the UE receives the paging message of the MBS based on the paging occasion corresponding to the first identifier, and at the moment, the paging occasion can be shared by a plurality of UEs related to the MBS, thereby improving the utilization efficiency of the paging resources of the system.

Fig. 7 illustrates a communication method according to an embodiment of the present invention. Compared with the embodiment shown in fig. 3, the embodiment shown in fig. 7 increases the interaction with the core network device, and further provides a communication interaction process between a plurality of UEs and the network on the basis of the embodiment shown in fig. 3. The embodiment shown in fig. 7 is used alone or in combination with the embodiment shown in fig. 3. For the function of a certain UE, the angle with the network device, or the term interpretation in this embodiment, the part related to fig. 3 may specifically refer to the description related to fig. 3, and is not described again in this embodiment.

S700, the core network equipment determines that the network equipment supports multicast paging.

Optionally, the core network device determines that the network device is a network device supporting multicast paging, for example, an MBS supporting node.

Optionally, when the multicast session is established, the network device supporting multicast paging displays an SMF carrying some MBS related indications to the core network. If the core network equipment does not receive the related indication, the network equipment is determined not to support the multicast paging.

The access network equipment supports multicast paging, and the identification network equipment can send the paging message of the MBS to the UE on the paging occasion corresponding to the UE without determining a new PO for sending the MBS paging.

Optionally, before that, MBS data arrives at a core network device, for example, a User Plane Function (UPF) of the core network device, and the core network device pages a UE corresponding to the MBS, for example, an Access and Mobility Management Function (AMF) of the core network device pages the UE corresponding to the MBS.

S701, the core network equipment sends first information to the network equipment, wherein the first information comprises the service identification of the MBS. Optionally, the first information further includes an identification list of the UE set.

When the step of S700 is optional, the core network device directly sends the first information, if the access network device receiving the first information is an access network device supporting multicast paging, the network device may process the first information, and if the network device receiving the first information does not support multicast paging, the network device ignores the first information, for example, by setting an allocation importance Assigned criterion field in a cell in the first message to "ignore".

Optionally, the first information is an NGAP (NG Application Protocol) message, or the first information is a part of the NG Application Protocol message. .

The core network equipment sends the service identification of the MBS and the UE set list to the access network equipment. The network device may know the set of UEs corresponding to the MBS, so as to perform MBS paging on these UEs. The list of UE sets may optionally be { UE1_ID, UE2_ID, …, UE N _ ID }, or corresponding to each UE in the UE set, e.g., {5G-S-TMSI 1,5G-S-TMSI 2,5G-S-TMSI 3, … }. Optionally, the UE set list may include both the UE _ ID of each UE and the 5G-S-TMSI corresponding to each UE.

Referring to the description in fig. 3, the first identifier is used to identify MBS, which may be used by the terminal and/or the network device to determine the paging occasion. The first identifier may be a service identifier of the MBS, such as an MBS session ID or an MBS service ID.

The UE set includes terminal 1 (UE 1) and terminal 2 (UE 2). UE1 and UE2 expect to receive the corresponding MBS.

S702, the network equipment sends system information to UE1 and UE 2.

Accordingly, UE1 and UE2 receive the system information from the network device.

The system information includes first indication information or includes SIBs related to MBS.

And S703A.UE 1 determines the paging occasion to calculate the identifier as the identifier of UE1 according to the system information.

Or, the UE1 selects the identifier of the UE1 from the identifier of the UE1 and the first identifier as the paging occasion calculation identifier according to the system information. The first identification is an identification indicating a multicast service MBS. Specifically, the UE1 determines the paging calculation identifier as the identifier of the UE according to the system information including the first indication information or according to the system information including the SIB related to the MBS. UE1 may also determine that the network device supports group paging according to the system information including the first indication information. That is, the network device is an MBS supporting node, and the UE1 determines that the network device does not support group paging according to the system information without including the first indication information, that is, the network device is a node MBS supporting node. Optionally, the first network device may be determined to be an MBS supporting node or a node MBS supporting node according to whether the first system message includes an SIB related to the MBS. And the UE1 determines the type of the network equipment and the corresponding method for receiving the multicast paging message according to the system information.

And S703B, the UE2 determines the paging occasion to calculate the identifier as the identifier of the UE2 according to the system information.

And S704A.UE 1 determines a first paging occasion according to the paging occasion calculation identifier.

If the UE1 determines that the paging occasion calculation identifier is the identifier of the UE1, the UE obtains the first paging occasion for receiving the multicast paging information according to the embodiment of fig. 3 with respect to the paging occasion calculation manner.

And S704B.UE 2 determines a second paging occasion according to the paging occasion calculation identifier.

Similar to UE1, UE2 determines the second paging occasion according to the identity of UE 2.

S705, the network equipment determines a first paging occasion according to the identifier of the UE1.

S706, the network equipment sends the paging message of the MBS to the UE1 at the first paging occasion.

The paging message of the MBS comprises the service identification of the MBS, and the UE1 determines to be paged by the MBS according to the service identification of the MBS in the paging message.

S707-S708 are similar to S705-S706 and are not described herein.

Optionally, when the network device periodically sends the paging message of the MBS to the UE1, the corresponding paging cycle is the DRX cycle of the UE1, or is an integer multiple of the DRX cycle of the UE1. Similarly, the period for UE2 to receive the multicast paging message is the DRX period of UE2 or an integer multiple of the DRX period.

And S709.UE 1 initiates a random access process or receives MBS in a non-connection state.

S710 is similar to S709 and will not be described again.

In the embodiment shown in fig. 7, the content related to fig. 3 may specifically refer to the related description related to fig. 3, for example, the content related to the system information in S702 may refer to the related description of S301, the related content in S703 may refer to S302, S709 may refer to S305, and so on, which are not described herein again.

The steps of steps S700, S701, S709, S710 in the communication method shown in fig. 7 are optional. There is no particular order between the steps. For example, S705 may occur before S703A, after S703, or may occur simultaneously, that is, UE1 and the network device determine that the first paging occasions have no absolute precedence order. Other steps are similar and have no specific sequence.

Fig. 8 illustrates a communication method according to an embodiment of the present invention. Compared with the embodiment shown in fig. 3, the embodiment shown in fig. 6 increases the interaction with the core network device and the network device 2, and provides a richer communication interaction process based on the embodiment shown in fig. 3. The embodiment shown in fig. 8 is used alone or in combination with the embodiment shown in fig. 3 and the embodiment shown in fig. 7.

S800, the core network equipment determines whether the access network equipment supports multicast paging.

The core network device determines that the network device 1 supports multicast paging and the network device 2 does not support multicast paging.

Support for multicast paging may be understood as having multicast paging functionality. The network device may send both unicast pages and multicast pages to the UE on the same PO.

Not supporting multicast paging may be understood as not having multicast paging functionality or for multicast paging the network device 2 is unaware. Network device 2 cannot distinguish whether a page is a multicast page or a unicast page. The NG Application Protocol messages sent by the core network device to the network device 2 have the same structure regardless of unicast paging or multicast paging.

S801, the core network device sends first information to the network device 1, wherein the first information includes a service identifier of the MBS and/or a user identifier list of the first UE set.

S802, the core network device sends second information to the network device 2, wherein the second information comprises an identifier indicating MBS.

Optionally, the second information may further include a first paging cycle, where the first paging cycle is a minimum value of DRX cycles of UEs in the UE set. The description related to the UE set and the paging cycle may refer specifically to the description related to fig. 3.

Optionally, as shown in table 2, the second information is an NG Application Protocol message or a part of the NG Application Protocol message, and indicates that the MBS identifier occupies a Paging Identity field of the UE in the NG Application Protocol message, and the first Paging cycle occupies a Paging DRX field in table 2.

TABLE 2

TABLE 3

As shown in table 3, the UE Paging Identity field may specifically be 5G-S-TMSI. For the network device 2 without multicast Paging function, the UE Paging Identity field may be used as the first Identity, i.e. the Identity indicating MBS. The number of bits of the first identifier is the same as the number of bits occupied by the 5G-S-TMSI. The related description of the first identifier may refer to the related description in the embodiment of fig. 3, and is not described herein again.

S803, the core network equipment sends a first signaling to the UE1, wherein the first signaling comprises a first identifier, namely an identifier indicating MBS.

UE1 accesses network equipment 1 and UE3 accesses network equipment 2. Optionally, the core network device further sends an identifier indicating the MBS to the UE 3. The indication MBS identifier corresponds to the MBS.

Optionally, the UE may determine the identifier indicating the MBS, for example, the identifier indicating the MBS is preconfigured; or indicating the MBS identifier as signaled, for example, the first signaling is broadcast signaling, NAS signaling, or RRC signaling; or determined according to the service identification and the corresponding relation of the MBS.

S804, the network equipment 1 sends system information 1 to the UE1.

The system information 1 includes the first indication information, or the system information 1 includes an MBS-related SIB.

S805, the network device 2 sends system information 3 to the UE 3.

The system information 3 does not include the first indication information, or the system information 3 does not include MBS-related SIBs.

And the S806A.UE 1 determines the paging occasion calculation identifier as the identifier of the UE1 according to the system information 1.

Optionally, the UE1 selects the identifier of the UE1 as the paging occasion calculation identifier according to the first indication information included in the system information 1, or the SIB related to the MBS included in the system information 1.

And the S806B.UE 3 determines the paging occasion calculation identifier as the identifier indicating the MBS according to the system information 3.

Optionally, the UE3 selects an identifier indicating the MBS as the paging occasion calculation identifier according to the first indication information included in the system information 3, or the SIB related to the MBS included in the system information 3.

The s807a.ue 1 determines a first paging occasion according to the paging occasion calculation identity.

The s807b.ue 3 determines a third paging occasion according to the paging occasion calculation identity.

The third paging occasion is calculated according to the identification indicating the MBS, and the third paging occasion may be commonly used by a plurality of UEs and is used for receiving paging of the MBS corresponding to the identification.

And S808, the network equipment 1 determines a first paging occasion according to the identifier of the UE1.

And S809, the network equipment 2 determines a third paging occasion according to the identification indicating the MBS.

S810, the network device 1 sends the paging message of the MBS to the UE1 on the first paging occasion.

The paging message of the MBS includes a service identifier of the MBS, such as an MBS session ID or an MBS service ID.

Optionally, UE1 belongs to the UE set. The network device 1 sends the paging message of the MBS to the UEs in the UE set on the first paging occasion.

S811, the network device 1 sends the paging message of MBS to the UE3 at the third paging occasion.

Optionally, UE1 monitors a paging message of a unicast service at the first paging occasion, and when the paging message received by UE1 at the first paging occasion includes an MBS service identifier, for example, an MBS session ID of MBS1, UE1 determines to be paged by MBS. Thereafter, similar to step S305 or step S709, UE1 initiates a random access procedure, accesses network device 1, and then receives the MBS from network device 1; or UE1 receives MBS in the unconnected state.

The UE3 listens on the third paging occasion, and the paging message received by the UE3 on the third paging occasion includes an identity indicating MBS, e.g. special 5G-S-TMSI. UE3 determines the MBS paging corresponding to the identification, for example, the MBS corresponding to the 5G-S-TMSI1 is MBS1. After determining to be paged by the MBS, the UE3 further carries out random access or MBS receiving in a non-connection state.

For example, the content related to the system information in S804 may be referred to in S301 and S702, the content related to the system information in S806 may be referred to in S302 and S703, and the content related to the system information in S709 may be referred to in S305, which is not illustrated again.

The steps of steps S800, S801, S802, S803, S810, S811 in the communication method shown in fig. 8 are optional. There is no particular order between the steps. For example, S808 may occur before S807A, may also occur after S807A, or may occur simultaneously, i.e., UE1 and the network device determine that the first paging occasion is not in absolute chronological order. Other steps are similar and have no specific sequence.

Fig. 9 is a schematic structural diagram of a UE provided in an embodiment of the present application.

As shown in fig. 9, UE900 is taken as a handset. It is to be appreciated that the UE900 is not limited to a handset and can be a terminal suitable for use in the systems shown in fig. 1A-1C, fig. 2. For ease of illustration, fig. 9 shows only the main components of UE 900. As shown in fig. 9, the UE900 includes a processor, memory, control circuitry, an antenna, and input-output devices. The processor is mainly used for processing communication protocols and communication data, controlling the whole UE900, executing software programs, and processing data of the software programs. The memory is used primarily for storing software programs and data. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, microphones, keyboards, etc., are mainly used for receiving data input by users and outputting data to users.

Taking the UE900 as a mobile phone, when the UE900 is powered on, the processor may read the software program in the storage unit, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent and outputs baseband signals to the control circuit, and the control circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is transmitted to the UE900, the control circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.

Those skilled in the art will appreciate that fig. 9 shows only one memory and processor for ease of illustration. In some embodiments, the UE900 may include multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this respect in the embodiment of the present invention.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the whole UE900, execute a software program, and process data of the software program. The processor in fig. 9 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. The UE900 may include multiple baseband processors to accommodate different network formats, the UE900 may include multiple central processors to enhance its processing capabilities, and various components of the UE900 may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

In one example, the antenna and the control circuit with transceiving functions may be considered as a transceiving unit 910 of the UE900, and the processor with processing functions may be considered as a processing unit 920 of the UE 900. As shown in fig. 9, the UE900 includes a transceiving unit 910 and a processing unit 920. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. Optionally, a device for implementing a receiving function in the transceiving unit 910 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 910 may be regarded as a transmitting unit, that is, the transceiving unit 910 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitting circuit, etc.

The embodiment of the present application further provides a network device, which can be used in the foregoing embodiments. The network device comprises means (means), units and/or circuits to implement the functionality of the network device 1 and/or the network device 2 as described in the embodiments shown in fig. 1A-1C, fig. 2 to 8. For example, the network device includes a transceiver module to support the UE to implement a transceiver function, and a processing module to support the network device to process signals. It is to be understood that the network device 1 and the network device 2 are interchangeable with respect to one or some UEs and the network device 1 and the network device 2 with respect to other UEs.

Fig. 10 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application. The communication device 1000 may be the communication device described in the foregoing embodiment, and the communication device for implementing the foregoing method embodiment may be the communication device with terminal function and/or the communication device with base station function in the foregoing embodiment, or a functional module in the foregoing communication device. The specific functions of the communication device can be referred to the descriptions in the above method embodiments.

The communications device 1000 includes one or more processors 1001. The processor 1001 may also be referred to as a processing unit and may implement certain control functions. The processor 1001 may be a general-purpose processor or a special-purpose processor, etc. For example, it includes: a baseband processor, a central processing unit, an applications processor, a modem processor, a graphics processor, an image signal processor, a digital signal processor, a video codec processor, a controller, a memory, and/or a neural network processor, among others. The baseband processor may be configured to process communication protocols as well as communication data. The central processor may be used to control the communication device 1000, execute software programs, and/or process data. The different processors may be separate devices or may be integrated in one or more processors, e.g., on one or more application specific integrated circuits.

Optionally, one or more memories 1002 are included in the communications apparatus 1000 to store instructions 1004 that are executable on the processor to cause the UE1000 to perform the methods described in the above method embodiments. Optionally, the memory 1002 may further store data. The processor and the memory may be provided separately or may be integrated together.

Optionally, the communication device 1001 may include instructions 1003 (which may also be referred to as code or program), and the instructions 1003 may be executed on the processor, so that the communication device 800 executes the method described in the above embodiments. Data may be stored in the processor 1001.

Optionally, the communications device 1000 may also include a transceiver 1005 and an antenna 1006. The transceiver 1005 may be referred to as a transceiver unit, a transceiver, a transceiving circuit, a transceiver, an input/output interface, etc. for implementing transceiving functions of the communication device 1000 through the antenna 1006.

Optionally, the communication device 1000 may further include one or more of the following components: the wireless communication module, the audio module, the external memory interface, the internal memory, a Universal Serial Bus (USB) interface, the power management module, the antenna, the speaker, the microphone, the input/output module, the sensor module, the motor, the camera, or the display screen. It is understood that in some embodiments, the UE1000 may include more or fewer components, or some components integrated, or some components disassembled. These components may be hardware, software, or a combination of software and hardware implementations.

The processor 1001 and the transceiver 1005 described herein may be implemented on an Integrated Circuit (IC), an analog IC, a radio frequency integrated circuit (RFID), a mixed signal IC, an Application Specific Integrated Circuit (ASIC), a Printed Circuit Board (PCB), an electronic device, or the like. The communication apparatus implementing the present description may be a standalone device (e.g., a standalone integrated circuit, a mobile phone, etc.), or may be a part of a larger device (e.g., a module that can be embedded in other devices), and may refer to the foregoing description of the UE and the network device, which is not described herein again.

The embodiment of the present application provides a UE, which (for convenience of description, referred to as UE) may be used in the foregoing embodiments. The UE comprises corresponding means (means), units and/or circuitry to implement the UE functionality as described in the embodiments shown in fig. 1A-1C, fig. 2-8. For example, the UE includes a transceiver module for supporting the UE to implement a transceiver function, and a processing module for supporting the UE to process a signal.

Fig. 11 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown in fig. 11, the network device 11 may be adapted for use in the system shown in fig. 1A-1C, fig. 2. The network device 11 may function as an access network device for a certain UE or certain UEs, or may function as a core network device for a certain UE or certain UEs. The network device includes: baseband device 111, radio frequency device 112, and antenna 113. In the uplink direction, the radio frequency device 112 receives information sent by the UE or the access network device through the antenna 113, and sends the information sent by the UE or the access network device to the baseband device 111 for processing. In the downlink direction, the baseband device 111 processes the information of the UE or the access network device and sends the information to the radio frequency device 112, and the radio frequency device 112 processes the information of the UE or the access network device and sends the information to the UE or the access network device through the antenna 111.

The baseband device 111 includes one or more processing units 1111, a memory unit 1112, and an interface 1113. Wherein the processing unit 1111 is configured to support the network device to execute the functions of the network device in the above method embodiments. The storage unit 1112 is used to store software programs and/or data. The interface 1113 is used for exchanging information with the rf device 112 and includes interface circuits for input and output of information. In one implementation, the processing unit is an integrated circuit, such as one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip. The memory unit 1112 and the processing unit 1111 may be located in the same chip, i.e. on-chip memory elements. Alternatively, memory unit 1112 and processing unit 1111 may be on a different chip than processing element 1111, i.e., off-chip memory elements. The storage unit 1112 may be a single memory or a combination of multiple memories or storage elements.

A network device may implement some or all of the steps in the above-described method embodiments in the form of one or more processing unit schedulers. For example, to implement the corresponding functionality of the network devices of fig. 3, 7, and/or 8. The one or more processing units may support wireless access technologies of the same system, and may also support wireless access systems of different systems.

Those of ordinary skill in the art will appreciate that the various illustrative elements and steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, for example, the division of the units is only one logical functional division, the units illustrated as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. The computer readable storage medium can be any available medium that can be accessed by a computer. Taking this as an example but not limiting: a computer-readable medium may include a Random Access Memory (RAM), a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), a compact disc read-only memory (CD-ROM), a universal serial bus flash disk (universal serial bus flash disk), a removable hard disk, or other optical disk storage, magnetic disk storage media, or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. In addition, by way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), or direct rambus RAM (DR RAM).

In this application, the number of nouns means "singular nouns or plural nouns" or "one or more" unless otherwise specified. "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. For example, A/B, represents: a or B. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, represents: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b and c can be single or multiple.

In the embodiments of the present application, the ordinal numbers such as "first", "second", etc. are used to distinguish a plurality of objects, and are not used to limit the size, content, sequence, timing, priority, or importance of the plurality of objects. This name does not indicate a difference in the size, content, priority, importance, or the like of the two pieces of configuration information.

The above description is only for the specific implementation of the present application, but the scope of the embodiments of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the embodiments of the present application, and all the changes or substitutions should be covered by the scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, comprising:

receiving system information from a network device;

determining a paging occasion calculation identifier according to the system information, wherein the paging occasion calculation identifier is an identifier of a terminal, or the paging occasion calculation identifier is an identifier indicating a multicast service;

determining a first paging occasion according to the paging occasion calculation identification;

and receiving a paging message of the multicast service on the first paging occasion.

2. The method of claim 1, wherein the determining a paging occasion calculation identifier according to the system information comprises:

if the system information includes system information related to multicast service, the paging occasion calculation identifier is the identifier of the terminal, or

And if the system information comprises first indication information, the paging occasion calculation identifier is the identifier of the terminal.

3. The method of claim 1 or 2, wherein the determining the paging occasion calculation identifier according to the system information comprises:

if the system information does not include system information related to the multicast service, the paging occasion calculation identifier is the identifier indicating the multicast service, or

And if the system information does not comprise the first indication information, the paging occasion calculation identifier is the identifier for indicating the multicast service.

4. The method according to claim 2 or 3, wherein the first indication information is used to indicate that no new paging occasion needs to be determined for a paging message for receiving multicast traffic.

5. The method according to any one of claims 1 to 4,

the indication multicast service identifier is preconfigured; or

The identification indicating the multicast service is notified by network signaling; or alternatively

The identification indicating the multicast service is obtained according to the service identification of the multicast service.

6. The method according to any one of claims 1 to 5,

the paging occasion calculation identifier is the identifier of the terminal, and the paging message of the multicast service comprises the service identifier of the multicast service; or alternatively

The paging occasion calculation mark is the mark indicating the multicast service, and the paging message of the multicast service comprises the mark indicating the multicast service.

7. The method according to any one of claims 1 to 6,

the multicast service is associated with a set of terminals, the set of terminals comprising one or more terminals, the identities of the terminals being identities of terminals in the set of terminals,

the paging occasion calculation identifier is the identifier indicating the multicast service, the paging cycle corresponding to the first paging occasion is a first paging cycle, and the first paging cycle is the minimum value of the Discontinuous Reception (DRX) cycles of one or more terminals in the terminal set.

8. The method of claim 7,

the identity indicating multicast service is different from the identity of one or more terminals in the set of terminals.

9. A method of wireless communication, comprising:

sending system information, wherein the system information comprises first indication information or the system information comprises system information related to multicast service;

determining a first paging occasion according to the identifier of the first terminal;

and sending a paging message of the multicast service to the first terminal at the first paging occasion.

10. The method of claim 9,

the first indication information is used for indicating that a new paging occasion is not required to be determined for receiving the paging message of the multicast service.

11. The method according to claim 9 or 10, characterized in that the method further comprises:

receiving first information from a core network device, where the first information includes a service identifier of the multicast service and an identifier list of a terminal set, the terminal set is associated with the multicast service, and the first terminal belongs to the terminal set.

12. The method according to any one of claims 9 to 11,

the first paging occasion is further configured to send a paging message of a unicast service to the first terminal.

13. The method according to any one of claims 9 to 12,

the paging message of the multicast service comprises a service identifier of the multicast service.

14. The method according to any one of claims 9 to 13,

and the paging cycle corresponding to the first paging occasion is a Discontinuous Reception (DRX) cycle of the first terminal.

15. The method according to any one of claims 9-14, further comprising:

the set of terminals further includes a second terminal,

determining a second paging occasion according to the identifier of the second terminal;

and sending a paging message of the multicast service to the second terminal at the second paging occasion, wherein a paging cycle corresponding to the second paging occasion is a DRX cycle of the second terminal.

16. A method of wireless communication, comprising:

determining whether the network device supports multicast paging;

when network equipment supports multicast paging, first information is sent to the network equipment, wherein the first information comprises a service identifier of multicast service and an identifier list of a terminal set, and the terminal set is associated with the multicast service;

and when the network equipment does not support multicast paging, sending second information to the network equipment, wherein the second information comprises an identifier indicating multicast service.

17. The method of claim 16, further comprising:

and sending a first signaling to the first terminal, wherein the first signaling comprises the identifier indicating the multicast service.

18. The method of claim 17,

the identifier indicating the multicast service is different from the identifiers of the terminal devices in the terminal set.

19. The method of any one of claims 16 to 18,

the second information further includes a first paging cycle,

the first paging cycle is the minimum value of DRX cycles of terminal devices in the terminal set.

20. A communication apparatus comprising a processor and an interface, the interface being configured to transmit and/or receive information, the processor being configured to perform the method of any one of claims 1 to 8, or to perform the method of any one of claims 9 to 14, or to perform the method of any one of claims 16 to 19.

21. A communication apparatus, comprising means for performing a method according to any of claims 1-8, or comprising means for performing a method according to any of claims 9-14, or comprising means for performing a method according to any of claims 16-19.

22. A computer-readable storage medium for storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 8, or causes the computer to perform the method of any one of claims 9 to 14, or causes the computer to perform the method of any one of claims 16 to 19.

23. A computer program product comprising instructions that, when executed, cause the method of any one of claims 1 to 8 to be performed, or cause the method of any one of claims 9 to 14 to be performed, or cause the method of any one of claims 16 to 19 to be performed.